html,
body {
	width: 100%;
	height: 100%;
	background-color: black;
	color:lightgrey;
}

.header_div {
	position: fixed;
	top: 0px;
	left: 0px;
	right: 0px;
	height: 56px;
	line-height: 56px;
	color: lightgrey;
	text-align: center;
	font-size: 20px;
	border-bottom: lightgrey solid 1px;
	background-color: black;
}
.content_div {
	width: 100%;
	margin-top: 57px;
	padding: 10px;
	font-size: 18px;
}
.content_div legend{
	margin-left: 10%;
}
.input_class{
	margin: 5%;
	height: 40px;
	width: 90%;
	padding-left: 10px;
	font-size: 18px;
}
.button_class {
	margin: 0 5% 5% 5%;
	height: 40px;
	width: 90%;
	font-size: 18px;
}